Offshore wind turbine blade installation: Development of a motion-compensated Stewart platform for blade installation with a floating vessel

With the increasing water depths of the new offshore wind farms, the challenging soil conditions, the availability of assets, and other factors, jack-up installation vessels may no longer be suitable to complete the installation scope of work for the new wind farms. Therefore, installation methods and techniques using floating vessels must be...

Optimal Feedforward Control for Offshore Wind Turbines During Grid Faults

Due to the increased share of (offshore) wind turbines, more stringent power requirements have been established. Importantly, the low-voltage ride-through requirement states that a wind turbine must remain connected to the electrical grid after a short intermittent grid fault. In the industry and academia many solutions have been proposed, but...

Realtime Data-driven Learning and Model Predictive Control using Gaussian Processes for Dynamical Systems

Nowadays, machine learning (ML) methods rapidly evolve for their use in model-based control applications. Model-based control requires an accurate model description of the dynamical system to reassure the performance of the controller. Conventionally, this model description is retrieved from first-principles modelling which can be problematic if...

Enhancing Wake Mixing in Wind Farms by Multi-Sine Signals in the Helix Approach

The development of offshore wind technology has progressed rapidly since the first offshore wind farm came to birth in 1991. During the last three decades, offshore wind has become an economically attractive option of renewable energy source for many countries to fulfill their commitment to combat the climate crisis. However, an open challenge...

A Convex Economic Model Predictive Control Framework for Hydraulic-Drivetrain Wind Turbines and Farms

In the mission to slow down global warming, the replacement of fossil fuels by renewable energy resources is key. A tipping point in the adoption of renewable energy resources is notable, as they are becoming economically more viable. Offshore wind energy is considered essential in realizing the greenhouse gas emission reduction targets. However...

Modeling and Control of an Offshore Wind Turbine with Hydraulic Drivetrain and Regenerative Power System

Climate change is an inevitable fact and governments worldwide have started to recognize this by expanding the contribution of renewable energy sources to our global energy production. Wind energy is currently one of the most attractive solutions for the transition to a more sustainable energy future. Since wind energy is not the only competitor...

On the effects of an azimuth offset in the MBC-transformation used by IPC for wind turbine fatigue load reductions

<br/>Wind energy currently is one of the most attractive solutions to help in the goal of switching to a more sustainable way of energy production. To stay competitive with other forms of energy production, the reduction of the Levelized Cost of Energy (LCoE) is an important indicator. One way of achieving this goal is by increasing the size of...

Control Design and Data-Driven Parameter Optimization for the DOT500 Hydraulic Wind Turbine

In an effort to reduce the Levelized Cost Of Energy (LCOE) of offshore wind energy to a market competitive level, a new wind turbine prototype with hydraulic drive train has been introduced by the start-up company Delft Offshore Turbine (DOT). In the DOT concept, a seawater pump is directly connected to the rotor shaft. The pump pressurizes sea...